Add translatable items to Spaces customtext

I'm trying to use the spaces_customtext module to override terms in my features, specifically the menu items, but can't get it to work. The only translatable items I get is the feature name itself and the title parameter of a hook_menu (which BTW isn't displayed as the menu item link text but as the heading on that page).

I've earlier had problems with #800252: Page not found when using Spaces Custom Text and non Language Neutral nodes, but have now disabled locale and cleaned out locale references in the db, so I'm guessing it isn't related to that (?). At least I'm not experiencing the issue in that post anymore.

I see the same issue in the eduglu install profile, and also if I try to install the eduglu features on my site. I've studied the Open Atrium features, and compared them to mine, but can't see any big differences that should cause this.. So, is there some magic in Open Atrium itself that makes this work there, but not on other sites, or what else am I missing? :)